To evoke angels . . . we need only to live in quiet expectation of their presence and attune ourselves to their heedings. . . . From time to time, angels conceive and bring about serendipitous experiences and events in our lives to remind us that we are continually in God's care and that we are part of a divinely ordered universe.
A legend told by the Venerable Bede says that the poet Caedmon was once completely mute. It was a custom in his village to spend evenings taking turns reciting poetry. On these occasions, Caedmon, unable to speak, would steal away to nearby hills to escape. One evening while walking alone, an angel appeared and urged him to sing. Miraculously, he began to sing and went on the become a famous poet.